DE167761C

DE167761C -

Info

Publication number: DE167761C
Application number: DE1903167761D
Authority: DE
Filing date: 1903-12-21
Anticipated expiration: 1923-12-22

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

M 167761 KLASSE M 167 761 CLASS

Es ist ein Nachteil der einfach wirkenden Preßgasantriebe für Eisenbahnsignale, daß sie nicht zwangsweise abhängig sind von ihrer Steuerung und von der Bedienungsstelle, sondern unbeabsichtigte Bewegungen und Eingriffe von außen her ermöglichen.It is a disadvantage of single-acting compressed gas drives for railroad signals that they are not necessarily dependent on their control and on the control point, but allow unintentional movements and interventions from outside.

Zur Vermeidung dieses Übelstandes hat man bereits die Antriebe doppelt wirkend gemacht, in der Weise, daß auch die Rückstellung des Signals nicht durch das Eigengewicht oder Federkraft bewirkt wurde, sondern durch das Treibmittel in Abhängigkeit von der Steuerung. .To avoid this inconvenience, the drives have already been made double-acting, in such a way that the resetting of the signal is not caused by its own weight or spring force, but by the propellant depending on the control. .

Derartige Einrichtungen sind bedeutend zuverlässiger als die eintriebigen, sind aber unwirtschaftlich durch großen Kraftverbrauch insofern, als zu jeder Bewegung eine Zylinderfüllung mit frischem Preßgas erforderlich ist. Es liegt daher die Aufgabe vor, Preßgasantrieb für Eisenbahnsignale derart einzurichten, daß ihre Bewegung zwangsweise abhängig ist nur von der Steuerung durch die Bedienungsstelle bei möglichst sparsamem Verbrauch an Preßgas.Such devices are significantly more reliable than the single-drive, but are uneconomical due to high power consumption inasmuch as one cylinder filling for every movement with fresh compressed gas is required. It is therefore the task of compressed gas drive set up for railway signals in such a way that their movement is compulsorily dependent can only be controlled by the operator station with the most economical consumption of compressed gas possible.

Durch vorliegende Erfindung wird diese Aufgabe dadurch gelöst, daß bei einem doppelt wirkenden Antrieb zur Rückstellung des Signals dasselbe Treibmittel verwendet wird, das in dem ersten Zylinder die erste Bewegung des Signals bewirkte. Zu diesem Zweck ist der Signalflügel von zwei Kolben verschiedenen Durchmessers oder Hubes abhängig, von denen der kleinere, durch den vollen Druck des Gases aus dem Behälter angetrieben, den Flügel in der einen Richtung beispielsweise auf. Fahrt stellt, während die Rückstellung durch Druck desselben Gases auf den großen Kolben erfolgt, wenn es durch die Steuerung aus dem kleinen Zylinder in den großen übergeleitet wird. Aus diesem entweicht das verbrauchte Gas in die freie Luft.This object is achieved by the present invention in that in one double-acting actuator uses the same propellant to reset the signal that caused the first movement of the signal in the first cylinder. To this The purpose of the signal wing is to depend on two pistons of different diameters or strokes, of which the smaller, by the full pressure of the gas from the container driven, the wing in one direction, for example. Ride poses while the Resetting is done by pressing the same gas on the large piston when it is controlled by the small cylinder is transferred to the great. The used gas escapes from this into the free air.

Zur Steuerung kann ein elektrisch oder durch Druckluft gesteuertes Doppelventil dienen, das zweckmäßig entsprechend der Zeichnung gestaltet ist. Wesentlich bei der Steuerung ist, daß sie vollkommen vom Stellwerk aus beherrscht wird und jede unbeabsichtigte oder unberufene Bewegung des Signals verhindert.A double valve controlled electrically or by compressed air can be used for control serve, which is designed appropriately according to the drawing. Essential to the Control is that it is completely controlled from the signal box and any unintentional or unsolicited movement of the signal is prevented.

Bei dem in der Zeichnung dargestellten Ausführungsbeispiel eines derartigen Preßgasantriebes ist eine elektrische Steuerung verwendet, die in folgender Weise wirkt. Sobald der Elektromagnet 1 seinen Anker 7 anzieht, verbindet er den kleinen Zylinder mit dem Preßgasbehälter durch das Ventil 4 und schließt ihn gegen den großen Zylinder durch das Ventil 3 ab. Die in den kleinen Zylinder strömende Preßluft drückt seinen Kolben nach unten und stellt den Signalflügel auf Fahrt. Dabei wird der mit dem kleinen Kolben verbundene größere ebenfalls in seine Endlage geschoben, wobei das in seinem Zylinder enthaltene Gas durch ein selbsttätiges Ventil 5 in die Luft entweicht. Am Schlüsse der Bewegung wird das Ventil 5 selbsttätig geschlossen, z. B. durch Aufstoßen auf den Zylinderboden, und damit der größere ' Zylinder von der Außenluft abgeschlossen.In the embodiment of such a compressed gas drive shown in the drawing an electrical control is used, which works in the following way. As soon as the electromagnet 1 attracts its armature 7, he connects the small cylinder with the compressed gas tank through the valve 4 and closes it against the large cylinder through valve 3. The one in the little cylinder flowing compressed air pushes its piston down and sets up the signal wing Journey. The larger one connected to the small piston will also be in his End position pushed, whereby the gas contained in its cylinder by an automatic Valve 5 escapes into the air. At the end of the movement, the valve 5 automatically closed, e.g. B. by bumping into the bottom of the cylinder, and thus the larger ' Cylinder closed off from the outside air.

In dieser Stellung bleibt das Signal unter dem Druck des frischen Preßgases, da der Zylinder in Verbindung mit dem Gasbehälter steht, solange dem Elektromagneten 1 Strom zugeführt wird. Die Rückstellung erfolgt bei Stromunterbrechung des Steuermagneten,In this position, the signal remains under the pressure of the fresh compressed gas, as the Cylinder is in connection with the gas container, as long as the electromagnet 1 current is fed. The reset takes place when the power to the control magnet is interrupted,

Claims

whereby the valve 4 between the compressed gas container and the small cylinder is closed and the overflow 3 is opened from the smaller to the larger cylinder. As a result, the compressed gas expands from the small cylinder into the larger one and, due to the excess pressure, moves the signal back to the difference in the piston cross-sections, without the consumption of fresh compressed gas. It is advisable to choose the volume of the large cylinder so that the pressure equalization of the gas with the atmosphere is completed before the stroke is completed. During the rest of the movement, the large piston acts as a suction brake. This can advantageously reduce the surge of the signal. With such a drive, the movement of the signal can be forced to depend on the control with the lowest possible power consumption. However, in order to control the movement of the signal completely and exclusively from the interlocking, safeguards against failure of the control and of the signal lever against unauthorized movement are required. With the present electrical control there is the risk of failure due to mechanical obstacles or magnetic remanence of the magnet armature 1. As a safety device, however, a second electromagnet 2 is arranged, which counteracts the magnet 1 and is switched so that when the current in 1 is interrupted, the armature 8 of the magnet 2 is attracted and the armature 1 pushes off. The control unit must be secured further to prevent the wing from being moved against the intention of the signalman by pulling the signal rod. In the case of the present control, this security is effected in a simple manner by a pawl 6 which, by engaging the detent 9 of the signal lever, would prevent the unsaved adjustment of the wing. When the device is working properly, however, the pawl is held released by the movement of the armature 7 of the control magnet 1 locking the pawl in its release position. The illustrated arrangement of the cylinders and control is only one example of the many embodiments of the inventive concept. It can e.g. B. the two separate pistons on a common piston rod can be replaced by a differential piston; You can also use pistons of the same diameter but different strokes and pistons that engage different lever arms. Furthermore, the smaller cylinder can be designed as a piston of the larger one. It is precisely for this arrangement of the cylinders that the idea of the invention is very extensive, namely to use two drive pistons of different diameters by allowing the same gas to act in them one after the other. The control can also be designed differently. It can e.g. B. the valve 5 of the large cylinder can be omitted entirely. A certain amount of leakage in the large cylinder is then sufficient at one point. The first movement of the signal would possibly be slowed down a bit, but this can only be pleasant with the forces and shocks occurring in the drive. Godfather nt-A ν Proverbs:

1. Compressed gas drive for railway signals in compulsory dependence on the Control point, characterized by a double-acting drive with cylinders different volume and such connection of the cylinders by electrical or by means of air pressure controlled valves that the position of the signal in the one direction used compressed gas is used for recovery.

2. embodiment of the compressed gas drive according to claim 1, characterized by dimensioning both cylinders in such a way that the expansion of the compressed gas when the pistons move into the "holding position" of the signal stops before the piston stroke, so lastly a suction effect occurs and the shock in the movement of the signal is reduced.

3. embodiment of the compressed gas drive according to claim I, characterized by two solenoids connected in this way to control the valves between the two cylinders, that in order to control the movement to secure the control according to the circuit, the armature of one pushes off the other.

4. embodiment of the compressed gas drive according to claim 1, characterized by locking the signal wing in one position depending on the control valve for the opposite Position, for the purpose of making the movement of the signal dependent only on the drive.

1 sheet of drawings.